SNDRV_PCM_IOCTL_READI_FRAMES 601 include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_READI_FRAMES _IOR('A', 0x51, struct snd_xferi) SNDRV_PCM_IOCTL_READI_FRAMES 601 tools/include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_READI_FRAMES _IOR('A', 0x51, struct snd_xferi)